CD/DVD Hard Drives and Memory

RAM problem

Hi to all.Just want to ask for help.
Im having trouble with my RAM.
I have 2 256MB ram.And what I have in my pc before was 1 256mb ram only.
Now when I add the another RAM the system seems to be not recognizing the other ram.
Anyone want to help me with this one?
Thanks!

I believe that the extra RAM might not be compatable with the system then, if this is the case then try to get something else like ram from some other company. Or you might have done something to the other chip while you were trying to fix this one, so I suggest you just open it up again and check if you've fixed both of them correctly.